Study on the effect of ultrasonic impact on residual stress and deformation in welding arc additive manufacturing

Abstract A 2219 aluminum alloy was manufactured by ultrasonic impact arc additive welding, and well-formed multilayer and multipass deposition parts were obtained. The residual stresses on the top and substrate of 2219 aluminum alloy samples deposited by the conventional arc and ultrasonic impingement arc were measured by ultrasonic stress testing equipment. Through experiments, the following conclusions were reached: the residual stress of those specimens subjected to ultrasonic impact is lower than that of the specimens without ultrasonic impact, and the residual stress of the arcing and quenching positions is the most obvious reduction. The deformation of the substrate treated by ultrasonic impact treatment is less than that of the sample without ultrasonic impact treatment.